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[[Image:drilling icon.png|right|80px]]

[[Image:Vonder rig in action.jpg|thumb|right|200px|Vonder rig in action]]

The Vonder rig is a [[Hand auger - general|hand auger method]] method that uses a heavy tripod, a winch, and a working table. It has been used extensively in Zimbabwe and distributed widely in sub-Saharan Africa. The cutting tool (auger head) is rotated to cut into the ground, and then withdrawn to remove excavated material. This is repeated until the required depth is reached.

* V&W Engineering Ltd, Zimbabwe (49 Leyland Road, P.O.Box 131,Harare). - Produces the Vonder rig.

===Field experiences===

* A Water Handbook, Technical Guidelines Series, UNICEF, 1999 - Programming and implementation. [http://www.unicef.org/wash/files/Wat_e.pdf Download].

* Water for the World, Technical note series rws 2, USAID 1982 - Technical notes on methods of developing of groundwater, manual drilling techniques. [http://www.lifewater.org/resources/ground_water.html Website Livewater International].

===Acknowledgements===

* The basis for the material on this page was obtained from a desk study shortly to be published on the website of the [http://www.practicafoundation.nl/ Practica Foundation], and from the [http://www.rural-water-supply.net/ Rural Water Supply Network], and specifically its [http://www.rural-water-supply.net/en/implementation/manual-drilling manual drilling manual drilling section].